A Microwave-Assisted Extraction Method for Determining Hot Water Solubility of Wood

Lan-sheng Kuo, Jen-fon Jen, Maw-rong Lee, Wen-shuang Hwang, Yin-li Cheng


A microwave-assisted extraction method is proposed as an alternative to the conventional method for determining the hot water solubility of wood. In this alternative method, microwave heating substitutes for the boiling water to extract part of the extraneous components as well as starches in wood tissues. Experimental results indicate that 100 mL water can be heated to boiling in only 75 s under the microwave radiation. Hence, only 15-20 min are required to complete the extraction procedure for Liquidambar formosana Hance and Swietenia mahagoni Jacq., 10 min and 5 min for Taiwania cryptomerioides and Cunninghamia lanceolata (Lamb) Hook, respectively. In general, a 15-min microwave heating has the potential to be an alternative to the conventional method, which requires 3 h for the hot water solubility determination.


Microwave-assisted extraction;hot water solubility;wood meal;irradiation;heat

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